Downgrade A520F from Oreo to Nougat if Samsung already blocked downgrade - Samsung Galaxy A3, A5, A7 (2017) Questions & Answe

I have moved all of our devices to A520F and TAB A (2016) runing LineageOS 14.1 and I am very happy with it. The bad side is one of the A520F, which aleady costs me 2 days because wether heimdall nor odin (i setup a windows machine to test it under windows too) replied with an valuable error when trying to flash nougat, except failed. I finally found out the at some version (i think August) it is not possible to downgrade the bootloader. Now I have one device running with an unsupported LineageOS 15.1 and had to hand it out to our Boss, because all other device had their new owners. She is kinda unhappy, that hers is different from others , but we cannot buy more A5's just to maybe receive one with an downgradeable Oreo version and trash all others.
My question is now is there any possibility to work around this and downgrade her phone to Nougat to be able to run 14.1 on it too. Any crack, special keys or whatever.
Thank you very much for any hint.

vstrecker said:
I have moved all of our devices to A520F and TAB A (2016) runing LineageOS 14.1 and I am very happy with it. The bad side is one of the A520F, which aleady costs me 2 days because wether heimdall nor odin (i setup a windows machine to test it under windows too) replied with an valuable error when trying to flash nougat, except failed. I finally found out the at some version (i think August) it is not possible to downgrade the bootloader. Now I have one device running with an unsupported LineageOS 15.1 and had to hand it out to our Boss, because all other device had their new owners. She is kinda unhappy, that hers is different from others , but we cannot buy more A5's just to maybe receive one with an downgradeable Oreo version and trash all others.
My question is now is there any possibility to work around this and downgrade her phone to Nougat to be able to run 14.1 on it too. Any crack, special keys or whatever.
Thank you very much for any hint.
Click to expand...
Click to collapse
Not at the moment, but 15.1 won't be too far away.

My experience: Downgrad is possible, but you can't downgrade all parts. Not 100% sure, but just don't downgrade BL.

Related

[Q]How To Root New Asus Fonepad 7 ME175CG Android Kitkat (4.4.2)

Hi good people. Now I know we have pretty much covered how to root the K00z Asus Fonepad 7 ME175CG, both dual and single sim version, but because it took a lot of time and responses, I kinda go lost somewhere along the way.
Now I got my Asus Fonepad 7 ME175CG (Dual Sim Version) two days ago and immediately upgraded to 4.4.2 Kitkat (It came with Jellybean). Now my new build number is KVT49L_WW_Fonepad-V5.3.4-20140626..., Kernel: 3.10.20.
From this point, I need help on:
How to back up my original ROM and setting so that I can revert to it in case of anything.
How to root my device and the tools I need to achieve that.
How to re-install the Android 4.4.2 on my device (or what next after rooting).
What I need to do to ensure that in case of an update, my device does not get bricked.
Any other relevant information on this
Please help me, good people. I am new here, new to Android, but from the little I've learned, in order to maximize on the full potential of my device, rooting is the way to go. THANK YOU!!
EyeOnly said:
Hi good people. Now I know we have pretty much covered how to root the K00z Asus Fonepad 7 ME175CG, both dual and single sim version, but because it took a lot of time and responses, I kinda go lost somewhere along the way.
Now I got my Asus Fonepad 7 ME175CG (Dual Sim Version) two days ago and immediately upgraded to 4.4.2 Kitkat (It came with Jellybean). Now my new build number is KVT49L_WW_Fonepad-V5.3.4-20140626..., Kernel: 3.10.20.
From this point, I need help on:
How to back up my original ROM and setting so that I can revert to it in case of anything.
How to root my device and the tools I need to achieve that.
How to re-install the Android 4.4.2 on my device (or what next after rooting).
What I need to do to ensure that in case of an update, my device does not get bricked.
Any other relevant information on this
Please help me, good people. I am new here, new to Android, but from the little I've learned, in order to maximize on the full potential of my device, rooting is the way to go. THANK YOU!!
Click to expand...
Click to collapse
http://forum.xda-developers.com/showpost.php?p=55464070&postcount=279 here is the link for root KOOZ

Zenfone 2 (ZE551ML) No further updates? regional thing?!

Good evening.
I'm living in Japan and after years of head aches and troubles with japanese-market-only phones I decided to get a new-no-contract-sim-free phone
I chose the Zenfone 2 due to its price and update availability..
It says it should get an update to Android 6.0 but when I tried to update I noticed its only on Android 5.0
No 5.1 or 5.2...
This phone was release in January if Im not mistaken.. is it possible they didnt update it nor fix any bugs in a year ?!
OR...
Does it the next chapter of me getting screwed cause I'm living in Japan?
I've check about the update and it says on their site FAQ that it is possible to update manually... Push a zip file..
https://www.asus.com/Phone/ZenFone_2_ZE551ML/HelpDesk_Download/
The latest version is:
Version WW_2.20.40.139
but I noticed there are WW CN TW and *drums rolling* JP versions...
Now, in some of the other versions I saw mentioning of JP thingy being updated... does it means I can Install a WW version on a JP phone ?
example:
25.Fix JP FlipFont issue
29.Remove BookLive from JP SKU
They write that:
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
so.. do I have to wait for a JP SKU ?!
My current ver. is:
Android 5.0 JP_2.20.40.97_20150917 (update from 3 months ago? yet still android 5.0!?)
Baseband : 1527_5.0.35.1_0815,1527_7.0.20.0_0723
Kernel version: 3.10.20-x86_64........
Build number: LRX21V.JP-ASUS_Z00A-2.20.40.97_20150917
Again.. is this a regional thingy?
Are all other Zenfone 2 still stuck on Android 5.0?
Btw I've got an unrooted 2GB version...
Thanks in advance to all the helpers
6.0 hasn't come out yet. We are all waiting for it.
Hi the whole "latest" android version thing is a plague caused OEMs and/or the dreadful carriers versions, they always (think they have to) add their flavor on top vanilla (stock) android, be it a launcher (the interface), replacing stock android and/or google apps, sometimes with good and fast results (e.g. Motorola) because they add to stock android rather than changing the whole thing (e.g. freaking Samsung).
You're better off flashing a custom ROM, if you follow instructions CAREFULLY it would take an hour if you're a beginner as it's hard -but not impossible- to brick newer phones.
Game Hustla said:
Hi the whole "latest" android version thing is a plague caused OEMs and/or the dreadful carriers versions, they always (think they have to) add their flavor on top vanilla (stock) android, be it a launcher (the interface), replacing stock android and/or google apps, sometimes with good and fast results (e.g. Motorola) because they add to stock android rather than changing the whole thing (e.g. freaking Samsung).
You're better off flashing a custom ROM, if you follow instructions CAREFULLY it would take an hour if you're a beginner as it's hard -but not impossible- to brick newer phones.
Click to expand...
Click to collapse
Question though..
Since its the JP SKU .. will I have problems ?
I had lots of problems on my XPERIAs, since they had JP systems/kernel/everything...
I only have experience tinkering with various japanese xperias... this is my first ZEN so... It should be easier to root and such than sony's... right?
It's easier to root and unlock bootloader than sony! As for changing JP to WW version of the firmware there is a guide how to. No risk of brick since you are familiar with these procedures as i read.
Hi @major9686
Do you recieve the monthly security and bug fix updates?
It seems that the japanese market has both WW and JP SKU phones. Hence the anomaly on the support page.
I don't know, flashing WW might break your cellphone service.
So 2.20.40.97 JP is the version your phone should have.
Yes the stock is still on android 5.0. and in time you will get 6.0 as will we all.
Android 6.0 is confirmed. But will take some time. This is true about most of the phones, except few who gets quick updates. Asus is still better than others.
Sent from Asus ZenFone 2 with Tapatalk
I dont really like my Asus so far ...
My EeePC gave me problems back in the day, the battery died and I cant replace it no one sells it anymore...
It barely lasted 2 years... now it only runs when plugged and even then lags (even after getting an SSD inside)
My Nexus 7 is also a bit laggy even after factory reset, only bought it 6 months ago
and my recently bought Zenfone 2, already been to repair once but problem still persists. Ear Receiver doesnt work, only if I press the screen around the ASUS logo, some sound gets out.
GPS is messed up, gyroscope as well.
SIM Card 1 is giving me trouble, only after several resets, factory reset and whats not it suddenly became readable without becoming unavailable after every few seconds...
and the most annoying thing, after the repair the USB port became loost, the cable isnt held in place as well as it was before the repair.
But you get what you paid for... so far I had a few Xperias and they all had great build quality. I'm soooo sorry I decided to get an asus this time
whats more, even getting an Asus sim-free I get stuck with the Japanese kernel which doesn't allow me to remove the friggin shutter sound from the camera unless I'll root it
Getting this piece was a big mistake. build quality is sooo bad!
Last Asus I'll ever buy...
In PC components already learned my mistake years ago and changed to Gigabyte...
And dont get me started on being stuck on Android 5.0 ... at least with sony we get 1-2 updates...
I got tired of waiting for an update. Bad battery life and Asus apps using most of the memory so I decided to unlock the boot loader yesterday with their software, rooted and installed Bliss Rom based on CM 6.0.1 witch is awesome
Hi,
I found the latest 2.20.40.164 firmware for Japan SKU on their support website.
NB: This is a full ROM.
Download
Sent from my GT-I9500

I need some tips

Hi there, i just bought this phone and it is already rooted, i tried to upgrade OS (it have Android 5.1) but for my surprise i cant because of root, im really new in all this and i need help with some things like...
Can i upgrade to Android 7.0 with the rom from the official page ?
My phone was SIM unlocked via Unlock Box, it is probably to have any problem if i update my OS ?
Which is the best Rom that you tried ??
Greetings.

Unlocking the bootloader Jan/2019

Hi all,
This topic isn't a new one, but I like to share my experience. It might be helpful! :good:
I purchased an honor 7x BND-l21 C185 last month thinking that Huawei still makes it possible to unlock it freely. Later I learned that it's no longer possible (shame on Huawei)
I started collecting data thinking of the safest and easiest way to get the code after UPDATING to Oreo.
These are the steps without further ado:
1- I downgraded to Nougat using HiSuit 5.0.0.2 which requires a stable internet speed (DON'T UPGRADE IF STILL ON NOUGAT)
2- Installed DC Unlocker ,HCU Tool and latest HiSuit (only found 8.x.x version) running a windows 10.
3- I purchased a code (4euros =4credits) with the help of a friend.
4- I used the software (HCU tool) and got my CODE in less than a minute (just follow instructions)
5- I unlocked my bootloader with Huawei Multi-Tool 8
6- I updated to latest Oreo firmware.
7- I tried RROS 6.x.x and now enjoying PIE (AEX Darkjoker ROM)
NB: I didn't do a backup through TWRP & it cost me a lot. Almost 5 days with NO calls after flashing a different region firmware (l21C343 or something)
Make sure to have Hurupdater & fullOTA to use them whenever necessary.
A bitter experience, shame on Huawei, but a GREAT device. Definitely worth the trouble :highfive:
Still playing stupid games to collect 4€ to unlock my P10 lite #Shame_on_Huawei

EMUI 9.1 for BND-L24

So I know there's no official way, but is there any hack for a BND-L24 owner in the USA to flash EMUI 9.1? I haven't unlocked the bootloader yet, but I have the code saved from back when we could get the code. Related question: is it worth it to unlock the bootloader and flash a different if I'm stuck on EMUI 8.0?
Basically, I've had my phone for about 2 years. I'm starting to get sick of it. The headphone jack has stopped working reliably. The GPS ain't what it used to be. How can I breathe some new life into this phone before I give up the ghost and replace it? Thanks for all your help.
For the GPS, there is a video out there that will help you clean the corrosion on the antenna contacts. That's suppose to really get it back to working perfect.
I know on my Mate 9, there was a work around using the Flashy tool that got a bunch of us USA users to 9.1. It did rebrand the phone from C567(USA) to C432(EU). It was actually a tool developed for the P20, but worked with the Mate 9. Not sure if the OP still has his links up or not. Here is the thread. https://forum.xda-developers.com/hu...uide-how-to-install-emui-9-android-9-t3839316 Big thing is finding the right firmware to download. Right now all I can find on FF is BND-LGRP2-OVS and BND-L22. I can't exactly recall, but I believe the BND-LGRP2 is a generic system image for all of the BND phones. Huawei has changed the way they are pushing out firmware. I know when I downloaded the firmware to upgrade my mate 9 it was a generic system image.
Ok, just double checked my research and the MND-LGRP2-OVS is a generic system image and should work regardless of the Cxxx varient you have. See post #75 for clarification in this thread
https://forum.xda-developers.com/mate-9/how-to/emui-9-1-mate-9-t3922650/page8

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